Old p275 number of rings jaasthi piston la so friction and compression jaasthi ..Aana iniku iruka M&M oda compare pana p275 old la carbon athigama oil la deposit aagi side wall housing la grease maari padiyum , aana latest la andha problem illa friction free floated rings and connecting rod , piston bass thavira skirt size kammi so les friction compare to old one Then ipo iruka 475Di ,575DI ,arjun ellame rings oda thickness (depth), width kammi so easy cranking , easy maintenance free Engine old Mahindravum Mf 1035 ordinary P3 um Waste
The carbon deposit is not due rings Due to its indirect firing method in pre combustion chamber Both latest m &m, ih b- 275 has same type of compression rings but b-275 has additional two oil scraper rings only ok
